Electrical Safety and NR-10

Electrical Installation Records

The Electrical Installation Records is a series of essential documents for the management and safe operation of a company’s electrical installations. According to NR-10, item 10.2.4, this record is mandatory for installations with a total installed load exceeding 75 kW and must be kept updated and available for consultation. The Electrical Installation Records include technical documents and information such as:

Electrical Projects: Single-line diagrams, installation layouts, and technical specifications of equipment.
Manuals and Operational Procedures: Detailed instructions for the safe operation of electrical systems, including emergency procedures.
Maintenance and Inspection History: Records of all maintenance and inspections performed on the installations, ensuring that systems are functioning as expected.
Training and Qualifications: Documentation of training received by workers who operate or interact with electrical installations.

The importance of the Electrical Installation Records lies in its ability to centralize all relevant information for the safety and operation of installations, facilitating risk management and ensuring compliance with safety standards. It also serves as a reference guide for maintenance teams and audits, helping to reduce accidents and operational failures.

Electrical Inspection Report

The Electrical Inspection Report is part of the record and provides a detailed analysis of the state of a company’s electrical installations. Required by NR-10, item 10.2.4 letter g, this report must be prepared by a qualified professional who assesses the compliance of the installations with current technical standards, such as NBR 5410. The Electrical Inspection Report includes:

Safety Condition Verification: Assessment of protections against electric shocks, short circuits, and fires.
Equipment Inspection: Checking the condition and operation of circuit breakers, fuses, transformers, and other critical components.
Identification of Non-Conformities: Detection of faults or irregularities that could compromise the safety of the installations and recommendations for corrective measures.

The Electrical Inspection Report is essential for ensuring that electrical installations comply with standards and operate safely. It helps prevent accidents such as electric shocks and fires, ensuring that all systems are functioning within established parameters. Additionally, the report serves as a tool for decision-making regarding preventive maintenance and improvements to the installations.

Lightning Protection System Report

The Lightning Protection System Report is a document that certifies the effectiveness of the lightning protection system installed in a building. This report is required by NR-10 and must follow the guidelines of NBR 5419, which specifies the criteria for the design, installation, inspection, and maintenance of the lightning protection system. The report includes:

System Compliance Assessment: Checking if the lightning protection system is correctly sized and installed according to the building’s characteristics and its exposure to lightning.
Visual and Instrumental Inspection: Visual examination of the lightning protection system components (such as air terminals, down conductors, and grounding systems) and electrical continuity and grounding resistance tests.
Improvement Recommendations: If the system shows faults or does not meet regulatory requirements, the report provides guidance for necessary corrections or upgrades.

The importance of the lightning protection system report is to ensure that the building and its occupants are protected from the destructive effects of lightning, which can cause fires, equipment damage, and risks to human life. A lightning protection system in compliance with standards significantly reduces the risk of material and personal damage in the event of lightning strikes.

Grounding Report

The Grounding Report is a technical document that assesses the conditions and efficiency of the grounding systems of an electrical installation, as required by NR-10. The grounding system is responsible for dissipating unwanted electrical currents to the ground, protecting both equipment and people. The report includes:

Grounding Resistance Measurement: Tests to measure the resistance of the grounding system, ensuring it is within acceptable limits for effective protection.
Visual and Functional Inspection: Checking the physical condition of electrodes, connections, and grounding conductors.
Compliance Assessment: Comparing obtained results with NBR 5410 requirements and recommendations for any necessary corrections.

The importance of the grounding report is to ensure that electrical installations are safe and that protection systems, such as circuit breakers and surge protection devices, will function correctly in case of electrical failures. An efficient grounding system prevents electric shocks, fires, and equipment damage, being crucial for operational safety.

Single-Line Diagrams

Single-Line Diagrams are simplified graphical representations of a company’s electrical installations, as required by NR-10 and NR-12, item 12.5.17. These diagrams are fundamental for visualizing and understanding the configuration of electrical systems, showing the connection between different components such as generators, transformers, distribution panels, circuit breakers, and loads. Our services include:

Updating the Single-Line Diagram.
Validating the Installed Circuit According to Applicable Standards.
Recommendations for Improvements.

An updated single-line diagram in compliance with standards allows technicians and engineers to quickly identify the layout and operation of systems, facilitating safe and effective interventions. Additionally, updated diagrams are indispensable during audits and technical inspections.

Thermographic Inspection Report

The Thermographic Inspection Report is a document resulting from thermographic analysis, a technique that uses infrared cameras to detect abnormal heating points in electrical equipment and installations, being an essential preventive tool. The report includes:

Thermal Mapping of Installations: Thermographic images identifying areas with elevated temperatures, indicating possible overloads, loose connections, or component failures.
Analysis and Interpretation of Results: Evaluation of identified hot spots and comparison with normal operating values.
Action Recommendations: Guidance for correcting identified problems, such as adjustments to connections, component replacements, or load redistribution.

The importance of the thermographic inspection report is to prevent catastrophic failures in electrical equipment, which can result in fires, production interruptions, and high repair costs. Early detection of thermal anomalies allows for preventive maintenance before problems escalate, increasing the safety and reliability of installations.

Electrical Quality Analysis

Aims to assess the parameters of the energy supplied and consumed in the installations, verifying its compliance with established standards. According to NR-10 and NBR 5410, this analysis is crucial for identifying issues such as harmonic distortions, voltage variations, frequency fluctuations, and other factors that may compromise the performance of electrical systems. The analysis includes:

Measurement of Electrical Parameters: Evaluation of voltage, current, power factor, harmonics, and other quality indicators.
Identification of Problems: Detection of abnormal conditions that can cause equipment malfunction, overloads, and efficiency losses.
Correction Recommendations: Guidance for implementing harmonic filters, voltage regulators, power factor correction, among other measures to improve energy quality.

The importance of energy quality analysis lies in preventing equipment failures, reducing energy consumption, and ensuring that installations operate efficiently and safely. Poor quality energy can cause unplanned shutdowns, damage to sensitive equipment, and increased operational costs.